MY NORTEL CYBIOLINK 8000 CORDED PHONE LOSES ALL THE DIRECTORY AND CALLER NUMBERS EVERYTIME THE POWER COMPANY HAS AN ELECTRICAL FART.
IS THERE A REPLACEABLE RECHARGEABLE BATTERY IN THIS UNIT AND IF SO WHERE IS IT LOCATED INSIDE.

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You have unheard messages on the voicemail system provided by your telephone company. This system records messages when someone calls while you're already on the phone. Please contact your telephone company for instructions on accessing their voicemail system.

Did you fully charge your phone? - Make sure you fully charge for 16-24 hours .

Is the battery old? - Replace the battery.

Is the electrical outlet switch turned on? - If you are using AC (electrical) power, make sure that the unit is connected to a non-switched electrical outlet.

Are the connecting wires tight - Unplug the AC power converter from the unit and plug it back in.

Do you have CallerID service with your telephone company - In order to receive CallerID records, you must subscribe to the standard name and number CallerID service available through your local telephone company. If the CallerID works for normal calls but not on Call waiting calls, then you must contact your phone company to get the combined CID/CW service.

CallerID shows up after second ring - Be sure to wait until the second ring before answering. CallerID signals comes through after the first ring, if caller pick ups phone too soon CallerID signal will not be transmitted to the handset.

Confirm that callerID is still working on that particular line by checking another phone on the same line - If CallerID is not coming through contact your phone company provider.

If this does not fix your problem, contact your authorized Service Center.*

transfer (under screen when on a call) is for internal transfer.
you need the external transfer feature from your phone company,
then a "link" key programmed on your phone. link is also feature 71.
when on a call you hit link or feature 71, then dial the cell or have
speed dial buttons for them,.

There is only a limited numbers of previous callersin a phone, since this is automatically erase asprogrammed. The answer to your question is yes,if and when your caller is not yet erased. You can inquire your telephone company, how many callers can your phone hold, before it is erased.

A question:
-> does your phone ring?
-> what software are you running on the system? If you know this will help a little in giving you more information.
There is a Feature that you can dial if your phone rings... when there is a call coming in, dial FEATURE 8 1 1
You can even make this a button rather than dialing this feature code everytime:
-> Feature * 3
-> press the button that you want to program
-> dial Feature 8 1 1

You need to configure your CS 1000 for Personal Directory / Redial List / Callers List through Element Manager. Instructions for doing this are in the IP Line Fundamentals NTP. You can download the NTP from www.nortel.com/support.